CPOA Spectacle Dispensing 5

Question 1

What is the purpose of 'face form' (wrap) angle in spectacle frame fitting?

Accepted Answer

It curves the frame front to follow the contour of the patient's face

Answer

Face form (wrap) angle describes how the frame front curves to match the natural curvature of the patient's face for better fit and aesthetics.

Question 2

Which of the following describes a 'slab-off' (bicentric) grind, and when is it used?

Accepted Answer

Prism ground into the lower segment of one lens to correct vertical imbalance in bifocals

Answer

Slab-off grinding removes base-up prism from the reading area of one lens to equalize vertical prism imbalance caused by anisometropia in bifocal wearers.

Question 3

A patient with a high minus prescription asks for the thinnest possible lenses. Which combination is best?

Accepted Answer

High-index material with a small eye-size frame

Answer

High-index materials have a steeper refractive index (thinner profiles), and smaller frames require less edge thickness for minus lenses.

Question 4

When using a pupillary distance ruler to measure monocular PD, the optician should align the ruler's zero at:

Accepted Answer

The center of the patient's nose bridge

Answer

The zero (reference point) is placed at the center of the nose bridge, and each pupil center is then measured to that midline.

Question 5

Which statement about polycarbonate lenses is correct?

Accepted Answer

They are impact-resistant and meet ANSI Z87.1 safety standards

Answer

Polycarbonate is inherently impact-resistant and is the standard material meeting ANSI Z87.1 for safety eyewear; it does require a scratch-resistant coating.

(CPOA) Certified Paraoptometric Assistant Practice Test

(CPOA) Certified Paraoptometric Assistant Practice Test

CPOA Spectacle Dispensing 5